:root {
      --primary-purple: #7928ca;
      --primary-glow: #9047ff;
      --secondary-purple: #f3ebff;
      --accent-magenta: #d946ef;
      --accent-cyan: #06b6d4;
      --text-main: #1e1b4b;
      --text-muted: #5b587b;
      --text-light: #8b88a8;
      --bg-light: #faf7ff;
      --bg-white: #ffffff;
      --card-bg: #ffffff;
      --card-border: #ede4fc;
      --card-hover-border: #c4b5fd;
      --shadow-sm: 0 4px 12px rgba(121, 40, 202, 0.05);
      --shadow-md: 0 10px 30px rgba(121, 40, 202, 0.1);
      --shadow-lg: 0 20px 45px rgba(121, 40, 202, 0.16);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --container-max: 1200px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 10% 20%, #f7f1ff 0%, #ffffff 40%),
                  radial-gradient(circle at 90% 80%, #f4e8ff 0%, #faf7ff 60%);
      background-attachment: fixed;
      color: var(--text-main);
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 头部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--card-border);
      box-shadow: 0 2px 10px rgba(121, 40, 202, 0.04);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .brand-logo-wrap .ai-page-logo {
      height: 42px;
      width: auto;
    }

    .brand-title {
      font-size: 22px;
      font-weight: 800;
      color: var(--primary-purple);
      letter-spacing: -0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      display: inline-block;
      padding: 10px 14px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-purple);
      background-color: var(--secondary-purple);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-full);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-purple) 0%, var(--accent-magenta) 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(121, 40, 202, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(121, 40, 202, 0.4);
      color: #ffffff;
    }

    .btn-secondary {
      background: #ffffff;
      color: var(--primary-purple);
      border-color: var(--card-hover-border);
    }

    .btn-secondary:hover {
      background: var(--secondary-purple);
      color: var(--primary-purple);
      transform: translateY(-2px);
    }

    .menu-toggle {
      display: none;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 区域公用样式 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 50px auto;
    }

    .section-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      background: var(--secondary-purple);
      color: var(--primary-purple);
      font-size: 13px;
      font-weight: 700;
      border-radius: var(--radius-full);
      margin-bottom: 16px;
      border: 1px solid rgba(121, 40, 202, 0.15);
    }

    .section-title {
      font-size: 34px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 首屏 Hero（无图片） */
    .hero-section {
      padding: 90px 0 70px 0;
      position: relative;
      overflow: hidden;
      background: linear-gradient(180deg, rgba(243, 235, 255, 0.6) 0%, rgba(250, 247, 255, 0) 100%);
    }

    .hero-inner {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-content {
      text-align: left;
    }

    .hero-tag-glow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid #d8b4fe;
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 700;
      color: var(--primary-purple);
      box-shadow: 0 4px 15px rgba(147, 51, 234, 0.12);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 40px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      background: linear-gradient(135deg, #6d28d9 0%, #db2777 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 17px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 34px;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      margin-bottom: 36px;
    }

    .btn-hero-official {
      padding: 14px 34px;
      font-size: 16px;
      font-weight: 700;
      background: linear-gradient(135deg, #7928ca 0%, #c026d3 100%);
      color: #ffffff;
      border-radius: var(--radius-full);
      box-shadow: 0 10px 25px rgba(121, 40, 202, 0.35);
    }

    .btn-hero-official:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 14px 32px rgba(121, 40, 202, 0.45);
      color: #ffffff;
    }

    .hero-model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      align-items: center;
    }

    .hero-model-tags span.label {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
      margin-right: 4px;
    }

    .model-chip {
      padding: 4px 10px;
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: 6px;
      font-size: 12px;
      font-weight: 600;
      color: var(--primary-purple);
    }

    .hero-visual-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 30px;
      border: 1px solid #e9d5ff;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .visual-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
      padding-bottom: 16px;
      border-bottom: 1px solid #f3e8ff;
    }

    .visual-dots {
      display: flex;
      gap: 6px;
    }

    .visual-dots i {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #cbd5e1;
      display: inline-block;
    }

    .visual-dots i:nth-child(1) { background: #f87171; }
    .visual-dots i:nth-child(2) { background: #fbbf24; }
    .visual-dots i:nth-child(3) { background: #34d399; }

    .visual-status-pill {
      font-size: 12px;
      font-weight: 700;
      color: #059669;
      background: #d1fae5;
      padding: 4px 10px;
      border-radius: var(--radius-full);
    }

    .visual-feature-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .visual-feature-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      padding: 14px;
      background: #faf5ff;
      border-radius: var(--radius-md);
      border: 1px solid #f3e8ff;
      transition: var(--transition);
    }

    .visual-feature-item:hover {
      background: #f5edff;
      transform: translateX(4px);
    }

    .feature-icon-box {
      width: 40px;
      height: 40px;
      border-radius: 10px;
      background: linear-gradient(135deg, var(--primary-purple), var(--accent-magenta));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 700;
      flex-shrink: 0;
    }

    .feature-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .feature-info p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 数据指标卡 */
    .metrics-bar {
      margin-top: -30px;
      position: relative;
      z-index: 20;
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #ffffff;
      padding: 28px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
      border: 1px solid #e9d5ff;
    }

    .metric-card {
      text-align: center;
      padding: 10px;
      border-right: 1px solid #f3e8ff;
    }

    .metric-card:last-child {
      border-right: none;
    }

    .metric-value {
      font-size: 32px;
      font-weight: 900;
      color: var(--primary-purple);
      margin-bottom: 4px;
    }

    .metric-title {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 2px;
    }

    .metric-desc {
      font-size: 12px;
      color: var(--text-light);
    }

    /* 关于与平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-text h3 {
      font-size: 26px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 18px;
      line-height: 1.4;
    }

    .about-text p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 16px;
    }

    .about-highlights {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }

    .highlight-card {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      padding: 16px;
      box-shadow: var(--shadow-sm);
    }

    .highlight-card strong {
      display: block;
      font-size: 15px;
      color: var(--primary-purple);
      margin-bottom: 6px;
    }

    .highlight-card span {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 卡片网格通用 */
    .card-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .card-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .service-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 26px;
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .service-card:hover {
      border-color: var(--card-hover-border);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--secondary-purple);
      color: var(--primary-purple);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 18px;
      font-weight: bold;
    }

    .service-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .service-card .card-footer-tag {
      margin-top: 16px;
      padding-top: 12px;
      border-top: 1px dashed #f1e7fe;
      font-size: 12px;
      font-weight: 600;
      color: var(--accent-magenta);
    }

    /* 对比评测 */
    .eval-highlight-box {
      background: linear-gradient(135deg, #7928ca 0%, #4f46e5 100%);
      color: #ffffff;
      padding: 30px;
      border-radius: var(--radius-lg);
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 30px;
      box-shadow: var(--shadow-lg);
    }

    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .eval-num {
      font-size: 48px;
      font-weight: 900;
      line-height: 1;
      background: #ffffff;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .eval-star-info {
      font-size: 15px;
    }

    .eval-stars {
      color: #fbbf24;
      font-size: 20px;
      margin-bottom: 4px;
      display: block;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--card-border);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f3e8ff;
    }

    .compare-table th {
      background: #fbf8ff;
      color: var(--text-main);
      font-weight: 700;
    }

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .compare-table .highlight-col {
      background: rgba(243, 235, 255, 0.4);
      font-weight: 600;
      color: var(--primary-purple);
    }

    /* 案例图片展示 */
    .case-gallery-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 24px;
      align-items: stretch;
    }

    .case-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .case-card .img-box {
      background: #f5f3ff;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .case-card .img-box img {
      width: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .case-card:hover .img-box img {
      transform: scale(1.03);
    }

    .case-info {
      padding: 20px;
      flex-grow: 1;
    }

    .case-info h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .case-info p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 标准流程时间线 */
    .step-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 14px;
    }

    .step-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 20px 14px;
      border: 1px solid var(--card-border);
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary-purple);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 14px;
      margin: 0 auto 12px auto;
    }

    .step-card h4 {
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .step-card p {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.4;
    }

    /* 表单与需求匹配 */
    .form-wrapper {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-md);
      max-width: 800px;
      margin: 0 auto;
    }

    .form-group-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
      margin-bottom: 20px;
    }

    .form-group label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #d8b4fe;
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      background: #faf7ff;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--primary-purple);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(121, 40, 202, 0.12);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* FAQ 手风琴 */
    .faq-list {
      max-width: 840px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: var(--card-hover-border);
    }

    .faq-header {
      padding: 18px 22px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 700;
      font-size: 15px;
      color: var(--text-main);
      user-select: none;
    }

    .faq-header::after {
      content: '+';
      font-size: 20px;
      color: var(--primary-purple);
      font-weight: 400;
      transition: var(--transition);
    }

    .faq-item.active .faq-header::after {
      transform: rotate(45deg);
    }

    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #fdfaff;
    }

    .faq-body-inner {
      padding: 0 22px 18px 22px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-quote {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }

    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f3e8ff;
      padding-top: 14px;
    }

    .reviewer-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-purple), var(--accent-cyan));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }

    .reviewer-details h5 {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

    .reviewer-details span {
      font-size: 12px;
      color: var(--text-light);
    }

    /* 文章与百科 */
    .article-section-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .article-box {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-sm);
    }

    .article-box h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 18px;
      color: var(--primary-purple);
      border-left: 4px solid var(--primary-purple);
      padding-left: 10px;
    }

    .article-link-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-link-list li a {
      font-size: 14px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .article-link-list li a:hover {
      color: var(--primary-purple);
      transform: translateX(4px);
    }

    /* 联系与二维码 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: center;
    }

    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .contact-info-item {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 16px;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--card-border);
    }

    .contact-icon-box {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--secondary-purple);
      color: var(--primary-purple);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 700;
    }

    .contact-info-text strong {
      display: block;
      font-size: 14px;
      color: var(--text-main);
    }

    .contact-info-text span {
      font-size: 13px;
      color: var(--text-muted);
    }

    .qr-card-box {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--card-border);
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .qr-card-box img {
      max-width: 160px;
      margin: 0 auto 14px auto;
      border-radius: var(--radius-sm);
      border: 1px solid #e9d5ff;
    }

    /* 页脚与友链 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--card-border);
      padding: 50px 0 30px 0;
      color: var(--text-muted);
    }

    .footer-links-row {
      margin-bottom: 24px;
      padding-bottom: 20px;
      border-bottom: 1px solid #f3e8ff;
    }

    .footer-links-row h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .friend-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-flex a {
      font-size: 13px;
      color: var(--text-muted);
    }

    .friend-links-flex a:hover {
      color: var(--primary-purple);
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: var(--text-light);
    }

    /* 悬浮客服与返回顶部 */
    .floating-tools {
      position: fixed;
      right: 24px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 999;
    }

    .tool-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid #d8b4fe;
      color: var(--primary-purple);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 18px;
      font-weight: 700;
      transition: var(--transition);
      position: relative;
    }

    .tool-btn:hover {
      background: var(--primary-purple);
      color: #ffffff;
      transform: scale(1.08);
    }

    .qr-tooltip {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid #e9d5ff;
      display: none;
      width: 140px;
      text-align: center;
    }

    .qr-tooltip img {
      width: 100%;
      border-radius: 4px;
    }

    .tool-btn:hover .qr-tooltip {
      display: block;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-inner {
        grid-template-columns: 1fr;
      }
      .card-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .step-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-card {
        border-right: none;
        border-bottom: 1px solid #f3e8ff;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--card-border);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 12px;
      }
      .card-grid-3,
      .about-grid,
      .case-gallery-grid,
      .article-section-grid,
      .contact-grid,
      .reviews-grid,
      .form-group-grid {
        grid-template-columns: 1fr;
      }
      .step-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .eval-highlight-box {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }